bool QGLPixelBuffer::hasOpenGLPbuffers()
{
// See if we have at least 1 configuration that matches the default format.
EGLDisplay dpy = QEgl::display();
if (dpy == EGL_NO_DISPLAY)
return false;
QEglProperties configProps;
qt_eglproperties_set_glformat(configProps, QGLFormat::defaultFormat());
configProps.setDeviceType(QInternal::Pbuffer);
configProps.setRenderableType(QEgl::OpenGL);
do {
EGLConfig cfg = 0;
EGLint matching = 0;
if (eglChooseConfig(dpy, configProps.properties(),
&cfg, 1, &matching) && matching > 0)
return true;
} while (configProps.reduceConfiguration());
return false;
}
// Chooses the EGL config and creates the EGL context
bool QGLContext::chooseContext(const QGLContext* shareContext) // almost same as in qgl_x11egl.cpp
{
Q_D(QGLContext);
if (!device())
return false;
int devType = device()->devType();
if ((devType != QInternal::Widget) && (devType != QInternal::Pbuffer)) {
qWarning("WARNING: Creating a QGLContext not supported on device type %d", devType);
return false;
}
// Get the display and initialize it.
if (d->eglContext == 0) {
d->eglContext = new QEglContext();
d->ownsEglContext = true;
d->eglContext->setApi(QEgl::OpenGL);
if (d->glFormat.samples() == EGL_DONT_CARE) {
// Allow apps to override ability to use multisampling by setting an environment variable. Eg:
// qputenv("QT_SYMBIAN_DISABLE_GL_MULTISAMPLE", "1");
// Added to allow camera app to start with limited memory.
if (!QSymbianGraphicsSystemEx::hasBCM2727() && !qgetenv("QT_SYMBIAN_DISABLE_GL_MULTISAMPLE").toInt()) {
// Most likely we have hw support for multisampling
// so let's enable it.
d->glFormat.setSampleBuffers(1);
d->glFormat.setSamples(4);
} else {
d->glFormat.setSampleBuffers(0);
d->glFormat.setSamples(0);
}
}
// If the device is a widget with WA_TranslucentBackground set, make sure the glFormat
// has the alpha channel option set:
if (devType == QInternal::Widget) {
QWidget* widget = static_cast<QWidget*>(device());
if (widget->testAttribute(Qt::WA_TranslucentBackground))
d->glFormat.setAlpha(true);
}
// Construct the configuration we need for this surface.
QEglProperties configProps;
configProps.setDeviceType(devType);
configProps.setPaintDeviceFormat(device());
configProps.setRenderableType(QEgl::OpenGL);
configProps.setValue(EGL_SURFACE_TYPE, EGL_WINDOW_BIT|EGL_SWAP_BEHAVIOR_PRESERVED_BIT);
qt_eglproperties_set_glformat(configProps, d->glFormat);
if (!d->eglContext->chooseConfig(configProps, QEgl::BestPixelFormat)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
// Create a new context for the configuration.
QEglContext* eglSharedContext = shareContext ? shareContext->d_func()->eglContext : 0;
if (!d->eglContext->createContext(eglSharedContext)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
d->sharing = d->eglContext->isSharing();
if (d->sharing && shareContext)
const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;
}
// Inform the higher layers about the actual format properties
qt_glformat_from_eglconfig(d->glFormat, d->eglContext->config());
// Do don't create the EGLSurface for everything.
// QWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface
// QGLWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface
// QGLPixelBuffer - no, it creates the surface itself and stores it in QGLPixelBufferPrivate::pbuf
if (devType == QInternal::Widget) {
if (d->eglSurface != EGL_NO_SURFACE)
eglDestroySurface(d->eglContext->display(), d->eglSurface);
d->eglSurface = QEgl::createSurface(device(), d->eglContext->config());
eglGetError(); // Clear error state first.
#ifdef QGL_NO_PRESERVED_SWAP
eglSurfaceAttrib(QEgl::display(), d->eglSurface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_DESTROYED);
if (eglGetError() != EGL_SUCCESS)
qWarning("QGLContext: could not enable destroyed swap behaviour");
#else
eglSurfaceAttrib(QEgl::display(), d->eglSurface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
if (eglGetError() != EGL_SUCCESS)
qWarning("QGLContext: could not enable preserved swap behaviour");
#endif
setWindowCreated(true);
}
return true;
}
bool QGLContext::chooseContext(const QGLContext* shareContext)
{
Q_D(QGLContext);
// Validate the device.
if (!device())
return false;
int devType = device()->devType();
if (devType != QInternal::Pixmap && devType != QInternal::Image && devType != QInternal::Widget) {
qWarning("QGLContext::chooseContext(): Cannot create QGLContext's for paint device type %d", devType);
return false;
}
// Get the display and initialize it.
d->eglContext = new QEglContext();
d->ownsEglContext = true;
d->eglContext->setApi(QEgl::OpenGL);
// Construct the configuration we need for this surface.
QEglProperties configProps;
qt_eglproperties_set_glformat(configProps, d->glFormat);
configProps.setDeviceType(devType);
configProps.setPaintDeviceFormat(device());
configProps.setRenderableType(QEgl::OpenGL);
// Search for a matching configuration, reducing the complexity
// each time until we get something that matches.
if (!d->eglContext->chooseConfig(configProps)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
// Inform the higher layers about the actual format properties.
qt_glformat_from_eglconfig(d->glFormat, d->eglContext->config());
// Create a new context for the configuration.
if (!d->eglContext->createContext
(shareContext ? shareContext->d_func()->eglContext : 0)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
d->sharing = d->eglContext->isSharing();
if (d->sharing && shareContext)
const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;
#if defined(EGL_VERSION_1_1)
if (d->glFormat.swapInterval() != -1 && devType == QInternal::Widget)
eglSwapInterval(d->eglContext->display(), d->glFormat.swapInterval());
#endif
// Create the EGL surface to draw into.
d->eglSurface = d->eglContext->createSurface(device());
if (d->eglSurface == EGL_NO_SURFACE) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
return true;
}
QT_BEGIN_NAMESPACE
#ifdef EGL_BIND_TO_TEXTURE_RGBA
#define QGL_RENDER_TEXTURE 1
#else
#define QGL_RENDER_TEXTURE 0
#endif
bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
{
// Create the EGL context.
ctx = new QEglContext();
ctx->setApi(QEgl::OpenGL);
// Find the shared context.
QEglContext *shareContext = 0;
if (shareWidget && shareWidget->d_func()->glcx)
shareContext = shareWidget->d_func()->glcx->d_func()->eglContext;
// Choose an appropriate configuration. We use the best format
// we can find, even if it is greater than the requested format.
// We try for a pbuffer that is capable of texture rendering if possible.
textureFormat = EGL_NONE;
if (shareContext) {
// Use the same configuration as the widget we are sharing with.
ctx->setConfig(shareContext->config());
#if QGL_RENDER_TEXTURE
if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGBA) == EGL_TRUE)
textureFormat = EGL_TEXTURE_RGBA;
else if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGB) == EGL_TRUE)
textureFormat = EGL_TEXTURE_RGB;
#endif
} else {
QEglProperties configProps;
qt_eglproperties_set_glformat(configProps, f);
configProps.setDeviceType(QInternal::Pbuffer);
configProps.setRenderableType(ctx->api());
bool ok = false;
#if QGL_RENDER_TEXTURE
textureFormat = EGL_TEXTURE_RGBA;
configProps.setValue(EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE);
ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
if (!ok) {
// Try again with RGB texture rendering.
textureFormat = EGL_TEXTURE_RGB;
configProps.removeValue(EGL_BIND_TO_TEXTURE_RGBA);
configProps.setValue(EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE);
ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
if (!ok) {
// One last try for a pbuffer with no texture rendering.
configProps.removeValue(EGL_BIND_TO_TEXTURE_RGB);
textureFormat = EGL_NONE;
}
}
#endif
if (!ok) {
if (!ctx->chooseConfig(configProps, QEgl::BestPixelFormat)) {
delete ctx;
ctx = 0;
return false;
}
}
}
// Retrieve the actual format properties.
qt_glformat_from_eglconfig(format, ctx->config());
// Create the attributes needed for the pbuffer.
QEglProperties attribs;
attribs.setValue(EGL_WIDTH, size.width());
attribs.setValue(EGL_HEIGHT, size.height());
#if QGL_RENDER_TEXTURE
if (textureFormat != EGL_NONE) {
attribs.setValue(EGL_TEXTURE_FORMAT, textureFormat);
attribs.setValue(EGL_TEXTURE_TARGET, EGL_TEXTURE_2D);
}
#endif
// Create the pbuffer surface.
pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties());
#if QGL_RENDER_TEXTURE
if (pbuf == EGL_NO_SURFACE && textureFormat != EGL_NONE) {
// Try again with texture rendering disabled.
textureFormat = EGL_NONE;
attribs.removeValue(EGL_TEXTURE_FORMAT);
attribs.removeValue(EGL_TEXTURE_TARGET);
pbuf = eglCreatePbufferSurface(ctx->display(), ctx->config(), attribs.properties());
}
#endif
if (pbuf == EGL_NO_SURFACE) {
qWarning() << "QGLPixelBufferPrivate::init(): Unable to create EGL pbuffer surface:" << QEgl::errorString();
return false;
}
// Create a new context for the configuration.
if (!ctx->createContext(shareContext)) {
delete ctx;
ctx = 0;
return false;
}
return true;
}
// Chooses the EGL config and creates the EGL context
bool QGLContext::chooseContext(const QGLContext* shareContext)
{
Q_D(QGLContext);
if (!device())
return false;
int devType = device()->devType();
QX11PixmapData *x11PixmapData = 0;
if (devType == QInternal::Pixmap) {
QPixmapData *pmd = static_cast<QPixmap*>(device())->data_ptr().data();
if (pmd->classId() == QPixmapData::X11Class)
x11PixmapData = static_cast<QX11PixmapData*>(pmd);
else {
// TODO: Replace the pixmap's data with a new QX11PixmapData
qWarning("WARNING: Creating a QGLContext on a QPixmap is only supported for X11 pixmap backend");
return false;
}
} else if ((devType != QInternal::Widget) && (devType != QInternal::Pbuffer)) {
qWarning("WARNING: Creating a QGLContext not supported on device type %d", devType);
return false;
}
// Only create the eglContext if we don't already have one:
if (d->eglContext == 0) {
d->eglContext = new QEglContext();
d->ownsEglContext = true;
d->eglContext->setApi(QEgl::OpenGL);
// If the device is a widget with WA_TranslucentBackground set, make sure the glFormat
// has the alpha channel option set:
if (devType == QInternal::Widget) {
QWidget* widget = static_cast<QWidget*>(device());
if (widget->testAttribute(Qt::WA_TranslucentBackground))
d->glFormat.setAlpha(true);
}
// Construct the configuration we need for this surface.
QEglProperties configProps;
configProps.setDeviceType(devType);
configProps.setRenderableType(QEgl::OpenGL);
qt_eglproperties_set_glformat(configProps, d->glFormat);
// Set buffer preserved for regular QWidgets, QGLWidgets are ok with either preserved or destroyed:
if ((devType == QInternal::Widget) && qobject_cast<QGLWidget*>(static_cast<QWidget*>(device())) == 0)
configProps.setValue(EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
if (!d->eglContext->chooseConfig(configProps, QEgl::BestPixelFormat)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
// Create a new context for the configuration.
QEglContext* eglSharedContext = shareContext ? shareContext->d_func()->eglContext : 0;
if (!d->eglContext->createContext(eglSharedContext)) {
delete d->eglContext;
d->eglContext = 0;
return false;
}
d->sharing = d->eglContext->isSharing();
if (d->sharing && shareContext)
const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;
}
// Inform the higher layers about the actual format properties
qt_glformat_from_eglconfig(d->glFormat, d->eglContext->config());
// Do don't create the EGLSurface for everything.
// QWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface
// QGLWidget - yes, create the EGLSurface and store it in QGLContextPrivate::eglSurface
// QPixmap - yes, create the EGLSurface but store it in QX11PixmapData::gl_surface
// QGLPixelBuffer - no, it creates the surface itself and stores it in QGLPixelBufferPrivate::pbuf
if (devType == QInternal::Widget) {
if (d->eglSurface != EGL_NO_SURFACE)
eglDestroySurface(d->eglContext->display(), d->eglSurface);
// extraWindowSurfaceCreationProps default to NULL unless were specifically set before
d->eglSurface = QEgl::createSurface(device(), d->eglContext->config(), d->extraWindowSurfaceCreationProps);
XFlush(X11->display);
setWindowCreated(true);
}
if (x11PixmapData) {
// TODO: Actually check to see if the existing surface can be re-used
if (x11PixmapData->gl_surface)
eglDestroySurface(d->eglContext->display(), (EGLSurface)x11PixmapData->gl_surface);
x11PixmapData->gl_surface = (void*)QEgl::createSurface(device(), d->eglContext->config());
}
return true;
}
